import sqlalchemy as sa
from sqlalchemy import orm
+from user import *
+from expenditure import *
+from split import *
+from subitem import *
+from transfer import *
+
from bluechips.model import meta
+from bluechips.model import types
+
+from datetime import datetime
def init_model(engine):
"""Call me before using any of the tables or classes in the model"""
- ## Reflected tables must be defined and mapped here
- #global reflected_table
- #reflected_table = sa.Table("Reflected", meta.metadata, autoload=True,
- # autoload_with=engine)
- #orm.mapper(Reflected, reflected_table)
sm = orm.sessionmaker(autoflush=True, transactional=True, bind=engine)
meta.engine = engine
meta.Session = orm.scoped_session(sm)
+### Database Schemas ###
+
+users = sa.Table('users', meta.metadata,
+ sa.Column('id', sa.types.Integer, primary_key=True),
+ sa.Column('username', sa.types.Unicode(32), nullable=False),
+ sa.Column('name', sa.types.Unicode(64)),
+ sa.Column('resident', sa.types.Boolean, default=True)
+ )
+
+expenditures = sa.Table('expenditures', meta.metadata,
+ sa.Column('id', sa.types.Integer, primary_key=True),
+ sa.Column('spender_id', sa.types.Integer,
+ sa.ForeignKey('users.id'), nullable=False),
+ sa.Column('amount', types.DBCurrency, nullable=False),
+ sa.Column('description', sa.types.Text),
+ sa.Column('date', sa.types.Date, default=datetime.now),
+ sa.Column('entered_time', sa.types.DateTime,
+ default=datetime.utcnow)
+ )
+
+splits = sa.Table('splits', meta.metadata,
+ sa.Column('id', sa.types.Integer, primary_key=True),
+ sa.Column('expenditure_id', sa.types.Integer,
+ sa.ForeignKey('expenditures.id'), nullable=False),
+ sa.Column('user_id', sa.types.Integer,
+ sa.ForeignKey('users.id'), nullable=False),
+ sa.Column('share', types.DBCurrency, nullable=False)
+ )
+
+subitems = sa.Table('subitems', meta.metadata,
+ sa.Column('id', sa.types.Integer, primary_key=True),
+ sa.Column('expenditure_id', sa.types.Integer,
+ sa.ForeignKey('expenditures.id'), nullable=False),
+ sa.Column('user_id', sa.types.Integer,
+ sa.ForeignKey('users.id'), nullable=False),
+ sa.Column('amount', types.DBCurrency, nullable=False)
+ )
+
+transfers = sa.Table('transfers', meta.metadata,
+ sa.Column('id', sa.types.Integer, primary_key=True),
+ sa.Column('debtor_id', sa.types.Integer,
+ sa.ForeignKey('users.id'), nullable=False),
+ sa.Column('creditor_id', sa.types.Integer,
+ sa.ForeignKey('users.id'), nullable=False),
+ sa.Column('amount', types.DBCurrency, nullable=False),
+ sa.Column('description', sa.Text, default=None),
+ sa.Column('date', sa.types.Date, default=datetime.now),
+ sa.Column('entered_time', sa.types.DateTime,
+ default=datetime.utcnow)
+ )
+
+### DB/Class Mapping ###
+
+orm.mapper(User, users)
+
+orm.mapper(Expenditure, expenditures, order_by=expenditures.c.date.desc(),
+ properties={
+ 'spender': orm.relation(User,
+ backref='expenditures',
+ lazy=False)
+})
+
+orm.mapper(Split, splits, properties={
+ 'expenditure': orm.relation(Expenditure, backref='splits'),
+ 'user': orm.relation(User)
+})
+
+orm.mapper(Subitem, subitems, properties={
+ 'expenditure': orm.relation(Expenditure, backref='subitems'),
+ 'user': orm.relation(User)
+})
+
+orm.mapper(Transfer, transfers, order_by=transfers.c.date.desc(),
+ properties={
+ 'debtor': orm.relation(User,
+ primaryjoin=(transfers.c.debtor_id==\
+ users.c.id),
+ lazy=False),
+ 'creditor': orm.relation(User,
+ primaryjoin=(transfers.c.creditor_id==\
+ users.c.id),
+ lazy=False)
+})
-## Non-reflected tables may be defined and mapped at module level
-#foo_table = sa.Table("Foo", meta.metadata,
-# sa.Column("id", sa.types.Integer, primary_key=True),
-# sa.Column("bar", sa.types.String(255), nullable=False),
-# )
-#
-#class Foo(object):
-# pass
-#
-#orm.mapper(Foo, foo_table)
-
-
-## Classes for reflected tables may be defined here, but the table and
-## mapping itself must be done in the init_model function
-#reflected_table = None
-#
-#class Reflected(object):
-# pass
+__all__ = ['users', 'expenditures', 'splits', 'subitems', 'transfers',
+ 'User', 'Expenditure', 'Split', 'Subitem', 'Transfer',
+ 'meta']